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Employee Benefits (Tables)
 3 Months Ended
Apr. 01, 2017
Compensation and Retirement Disclosure [Abstract]  
Components of Plan Benefit Expense
Pension
 
Quarter ended
(millions)
April 1, 2017
April 2, 2016
Service cost
$
25

$
24

Interest cost
41

44

Expected return on plan assets
(90
)
(89
)
Amortization of unrecognized prior service cost
2

3

Recognized net loss
3

—

Curtailment loss
1

—

Total pension (income) expense
$
(18
)
$
(18
)

Other nonpension postretirement
 
Quarter ended
(millions)
April 1, 2017
April 2, 2016
Service cost
$
5

$
5

Interest cost
9

10

Expected return on plan assets
(24
)
(22
)
Amortization of unrecognized prior service cost (credit)
(2
)
(3
)
Recognized net (gain) loss
(29
)
—

Curtailment loss
3

—

Total postretirement benefit (income) expense
$
(38
)
$
(10
)

Postemployment
 
Quarter ended
(millions)
April 1, 2017
April 2, 2016
Service cost
$
1

$
2

Interest cost
1

1

Recognized net loss
1

1

Total postemployment benefit expense
$
3

$
4
Contributions to Employee Benefit Plans
(millions)
Pension
Nonpension postretirement
Total
Quarter ended:
 
 
 
April 1, 2017
$
21

$
3

$
24

April 2, 2016
$
13

$
4

$
17

Full year:
 
 
 
Fiscal year 2017 (projected)
$
26

$
16

$
42

Fiscal year 2016 (actual)
$
18

$
15

$
33